Question

the structure of the atom
quiz complete
1 2 3 4 5 6 7 8 9 10
carbon-12 and carbon-13 are isotopes of carbon. which of the following statements is correct?
they both have seven protons in the nucleus.
they both have the same mass number.
they both have seven neutrons in the nucleus.
they both have the same atomic number.

Explanation:

6 protons. The mass number differs (12 vs. 13) because they have different numbers of neutrons (6 for C-12, 7 for C-13).

Answer:

6 protons. The mass number differs (12 vs. 13) because they have different numbers of neutrons (6 for C-12, 7 for C-13).